Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos treinadores principais chamados Darius Mikaeili?
 ###Tabelas: CREATE TABLE singles:_10_4–6 (singles:_10_4–6_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent in Final VARCHAR, Score in Final VARCHAR) CREATE TABLE long_range_am_stations (long_range_am_stations_id AUTO_INCREMENT PRIMARY KEY, Frequency INT, Callsign VARCHAR, Brand VARCHAR, City of License VARCHAR, Website VARCHAR, Webcast VARCHAR) CREATE TABLE preliminary_competition (preliminary_competition_id AUTO_INCREMENT PRIMARY KEY, State VARCHAR, Interview INT, Swimsuit INT, Evening gown INT, Average INT) CREATE TABLE personnel_and_sponsoring (personnel_and_sponsoring_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Head coach VARCHAR, Team captain VARCHAR, Kit maker VARCHAR, Shirt sponsor VARCHAR, Past Season VARCHAR) CREATE TABLE list_of_agriculture_ministers (list_of_agriculture_ministers_id AUTO_INCREMENT PRIMARY KEY, Order VARCHAR, Minister VARCHAR, Party VARCHAR, Prime Minister VARCHAR, Title VARCHAR, Term start VARCHAR, Term end VARCHAR, Term in office VARCHAR)  
SELECT COUNT Head coach FROM personnel_and_sponsoring WHERE Team captain = Darius Mikaeili